The closest that I could find was a "C" series. Be aware that there are no board schematics or block diagrams included in any newer service manuals.

Repair is officially limited to board replacement. There are basically 3 available parts - power supply, main board, panel (includes T-Con board).

My Distributor does not have anything for the sets, however.

Anything further and you're going to need to keep searching for DIY solutions for any particular issue that you are having._________________Just call me Zaphod (or Steve) --- I never should have started using numbers in a screen name but I just can't stop now.